Q: What are the prime factors of the number 213,422,405?

 A: 5, 7, 23, 11527

Why are those the prime factors of the number 213,422,405?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 213,422,405

213,422,405
Factor Arrows
542,684,481
Factor Arrows
76,097,783
Factor Arrows
23265,121
Factor Arrows
2311,527

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

5, 7, 23, 11527

We can check our work by multiplying all of the prime factors together: 5 x 7 x 23 x 23 x 11,527 = 213,422,405

This can also be written as 51 x 71 x 232 x 11,5271 = 213,422,405

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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